ProsKit MT-1210 Economic Digital Multimeter Instruction Manual

ProsKit MT-1210 Economic Digital Multimeter

SAFETY INFORMATION

This multimeter has been designed according to IEC 1010 concerning electronic measuring instruments with an overvoltage category (CAT II) and pollution 2. Follow all safety and operating instructions to ensure that the meter is used safely and is kept in good operating condition. Full compliance with safety standards can be guaranteed only with test leads supplied. If necessary, they must be replaced with the type specified in this manual.

SAFETY SYMBOLS

MAINTENANCE

• Before opening the case, always disconnect test leads from all energized circuits.
• For continue protection against fire; replace fuse only with the specified voltage and current ratings: F 500mA/250V(Quick Acting)
• Never use the meter unless the back cover is in place and fastened completely.
• Do not use abrasives or solvents on the meter. To clean it using a damp cloth and mild detergent only.

DURING USE

• Never exceed the protection limit values indicated in specifications for each range of measurement.
• When the meter is linked to measurement circuit, do not touch unused terminals.
• Never use the meter to measure voltages that might exceed 500V above earth ground in category II installations.
• When the value scale to be measured is unknown beforehand, set the range selector at the highest position.
• Before rotating the range selector to change functions, disconnect test leads from the circuit under test.
• When carrying out measurements on TV or switching power circuits always remember that there may be high amplitude voltages pulses at test points, which can damage the meter.
• Always is careful when working with voltages above 60V dc or 30V ac rms. Keep fingers behind the probe barriers while measuring.
• Before attempting to insert transistors for testing, always be sure that test leads have been disconnected from any measurement circuits.
• Components should not be connected to the hFE socket when making voltage measurements with test leads.
• Never perform resistance measurements on live circuits.

GENERAL DESCRIPTION

The meter is a handheld 3 1/2 digital multimeter for measuring DC and AC voltage, DC current, Resistance, Diode, Transistor and Continuity Test and 1.5V battery test.
The Back light of display is optional.

FRONT PANEL DESCRIPTION

Display

1. 3 1/2 digit, 7 segment, 15mm high LCD.

2. Back light
   When this button is pushed, the Back light of display is on; press the Back light button once, and the backlight is turned off.

3. Rotary switch
   This switch is used to select functions and desired ranges as well as to turn on/off the meter.

4. Hold button
   When this button is pushed, the display will keep the last reading and ” ” symbol will appear on the LCD until pushing it again.

5. “10A” jack
   Plug in connector for red test lead for 10A measurement. “COM” jack

6. Plug in connector for black (negative) test lead. “VmA” jack

7. Plug in connector for red (positive) test lead for voltage, resistance and current (except 10A) measurements.

SPECIFICATIONS

Accuracy is specified for a period of one year after calibration and at 18°C to 28°C(64°F to 82°F) with relative humidity to 80%.

GENERAL

DC VOLTAGE

DC CURRENT

AC VOLTAGE

Overload Protection: 500V dc or rms. ac for all ranges.
Frequency range: 40Hz to 400Hz. Response: Average responding, calibrated in rms. of a sine wave.

RESISTANCE

Maximum Open Circuit Voltage: 2.8V
Overload Protection: 250V dc or rms. ac for all ranges.

TRANSISTOR hFE TEST (0-1000)

BATTERY TESTING

OPERATING INSTRUCTIONS DC VOLTAGE MEASUREMENT

1. Connect the red test lead to the “V.Ω.mA” jack and the black lead to the “COM” jack.
2. Set rotary switch at desired DCV position. If the voltage to be measured is not known beforehand, set range switch at the highest range position and then reduce it until satisfactory resolution is obtained.
3. Connect test leads across the source or load being measured.
4. Read voltage value on the LCD display along with the polarity of the red lead connection.

TRANSISTOR TEST

1. Set the rotary switch at “hFE” position.
2. Determine whether the transistor under testing is NPN or PNP and locate the emitter base and collector leads. Insert the leads into proper holes of the hFE socket on the front panel.
3. Read the approximate hFE value at the test condition of base current 10μA and Vce 2.8V.

NOTE: To avoid electrical shock, remove test leads from measurement circuits before testing a transistor.

AUDIBLE CONTINUITY TEST

1. Connect red test lead to “V.Ω.mA”, black test lead to “COM”.
2. Set range switch to ” ” position.
3. Connect test leads to two points of circuit to be tested. If continuity exists, built-in buzzer will sound.

BATTERY TEST

1. Connect the red test lead to “V.Ω.mA” jack and black test lead to the “COM” jack
2. Set the rotary switch at desived “1.5V mA ” position
3. Connect the red test lead to the battery ”+” and the black test lead to the battery “-”.
4. Read mA value on the LCD display. If the value is less than 40mA, it means the battery is low.

WARNING: To avoid electric shock, be sure the thermocouple has been removed before changing to another function measurement.

BATTERY & FUSE REPLACEMENT

If ” ” appears on display, it indicates that the battery should be replaced.
Fuse rarely need replacement and blow almost always as a result of operator’s error.
To replace battery & fuse (500mA/250V) remove the 2 screws in the bottom of the case. Simply remove the old, and replace with a new one.
Be careful to observe battery polarity.

WARNING: Before attempting to open the case, always be sure that test leads have been disconnected from measurement circuits.
Close case and tighten screws completely before using the meter to avoid electrical shock hazard.

ACCESSORIES

• Operator’s instruction manual
• Set of test leads
• Holster

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